Elevator-stop mechanism



Oct. 30, 1928.

J. s. vRAHoRlTls EL'EVATOR STOP MECHANISM Filed July ll, 1927 2 Sheets-Sheet A TTORN E Y.

Oct 3o, 1928. 1,689,264

' J. S. VRAHORiTlS ELEVATOR STOP MECHANI SM Filed July 11,1927 2 sheets-sheet 2 I N VEN TOR.

l ATTORNEY.

Patented Oct. 30, 1928.

UNITED STATES PATENT OFFICE.

JOHN S. VRAHORITIS, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO STANLEY J. ABROMAITIS, OF DETROIT, MICHIGAN.

ELEVATOR-STOP MECHANISM.

Application led .T uly 11,

This invention relates to elevatorl stop mechanisms and the object of the invention is to provide a means for stopping an elevator automatically upon breakage of the elevator cable.

Another object of the invention is to provide a stop mechanism normally maintained in inoperative relation by the elevator cable and adapted to be automatically actuated upon breakage of the elevator cable.

Another object of the invention is to provide an elevator stop mechanism consisting of levers pivotally secured to the top and bottom of the elevator and actuated simultaneously upon breakage of the elevator cable to engage in toothed racks provided therefor in the elevator shaft.

These objects and the several novel features of the invention are hereinafter more fully described and claimed and the preferred form of construction by which these objects are attained is shown in the accompanying drawings in whichj Fig. 1 is a side elevation of an elevator equipped with my improved stop mechanism.

Fig. 2 is a plan view thereof.

Fig. 3 is a section taken on Fig. 2. A

As Vwill be understoodA from Figs. 1 and 2 the elevator 1 is slidable in the ways 2. A series of four brackets 3 are secured to the top of the elevator, each having a pin 4 extendy ing through a slot 5 in the respective lever 6. These pins 4 provide pivots for the levers 6 and the levers 6 are connected together inpairs by the hinges 7 shown in Figs. 1 and 2. Each lever is enlarged adjacent the hinge 7 to provide abutting ends 8 above the hinge 7 and abutting ends 9 below the hinge 7. These abutting ends 8 and 9 limit turning movement of the levers 6 on the pivot 7. The levers on opposite sides of the hinges 7 are connected together by the bars 1() as shown more particularly in Fig. 2. A hinge 11 is provided over the center of the elevator and is connected to two members 12 which, as shown in Fig. 2, are connected to the cross bars 10. The hinge 11 is mounted so that its axis is in yalignment with the axes of the hinges 7 and the members 12 are provided with apertures 13 through which the elevator cables 14 extend. These elevator cables 14 are sei cured in a mounting 15 secured to the top of line 3%3 of 1927. Serial No. 204,743.

the elevator cage and a collar 16 is secured to each cable 14 and engages beneath the members 12 as shown in Fig. 3 which holds the members 12 and pivot 11 in the raised position with the levers 6 out of engagement with the racks 17 provided therefor in the elevator shaft. This position of the hinged pivot 11 is communicated through the members 12and cross bars 10 to hold the pivots 7 in alignment with the pivot point y11 and with the abutting faces 9 of the levers in engagement beneath the hinges 7. Brackets 18 are secured to the top of the elevator and springs 19 are connected to these brackets and to the pins 20 extending from the levers 6. When the parts are in the inoperative positionl shown in full lines in Fig. 1 the springs 19 are extended as shown. As shown in Figs. 1 and 2 an arm 21 iszpivotally connected to each lever 6 and extends downwardly below the bottom of the elevator and is pivotally connected to a companion lever 6a which is an exact duplicate of the lever 6. Brackets 3a are provided on the bottom of the elevator which are similar to the brackets 3 and provide pivots for the levers 6a. -By providing the arms 21 the levers 6a are operated in conjunction with the levers 6 so that the stop mechanism engages in the racks at both the top and bottom of the elevator cage. A sto-p 22 is provided on the bottom ofthe. elevator for each lever 6? ,and against which the levers 6L are adapted to engage when in the locked position as shown in dotted lines in Fig. 1.

In operation the elevator travels up and down in the elevator shaft with the parts in the position shown in full lines in Fig. 1. Should the cables 14 break the collars 16 are unsupported and the springs 19 draw the inner ends of the levers 6 and the hinges 7 downwardly until the end faces 8 of the levers engage thus moving the levers 6 outwardly on the pivots 4 into engagement in the toothed racks 17. This movement of the levers 6 is communicated by means of the pivoted arms 21 to the levers 6'J1 which are also moved into engagement with the racks 17 and the levers 6a also engage against the stops 22 which rigidly supports the elevator and the arms 21 take the direct strain of supporting the ends of the upper levers 6 in the racks. To release the locking arrangement it is only necessary to repair the break in the. cables and again' its utility and mode of operation, what I claim and desire to secure by Letters Patent of the vUnited States is- 1. In an elevator stop mechanism, an ele` va-tor cage,1 a series of hoisting lcables'attached thereto, a pairof levers at each side of the cage hingedly'connected together atthe abutti'nglends, each lever being provided With a slot intermediate its endsa bracketfor 'each lever secur'ed'to thetop of the elevator cage,

' a pin secured in each bracket andekten'ding through the slot in the respective -"lever, a series ofA racks in' the elevator shaft adapted to'beengaged by tlie'ends of the levers, means supported on the cables normally holding the levers out'of' engagement ivith the racks, a series of springs adapted to throw the levers into engagement Wit-h'the'racks upon breaki age of the elevator cables, a 'series of levers onV the bottom ofthe elevator "cage adapted to'be actuated in conjunction with the levers on thetop"ofthefelevator cage and a series ofstops on thebottom of the elevator' cage limiting up'vvarthmo'vement :of the lovver levers when iii/engagement with the racks. p

2'. In an eleva-torstop mechanism'jan lelevator cage,`a seriesf'f hoistingcables attached thereto, a pair of levers atz'eacliside" ofl the cage eachlp'ivotgally mounted intermedia-te its ends on the top of the cage, each pairof levers being hingedly connected together at the abutting ends, a series of racks in the elevator shaft adapted to be engaged by the ends of the levers, means supported on the cables normally holding the levers out of engagement With the racks, a series of springs tending to throw the levers into engagement ivith'the racks upon breakage of the elevator cables,

a series- `of levers pivotally mounted on the bottom of the cage corresponding in position to thelevers'oii` the top of the cage, and an arm connecting each lever on the top of the` cage with the respective lever on 'the bottom of the cage nfor sin'iultaneou'sly actuating the lower lever With the respective upper lever.

3; Inan elevator stop mechanism', an 'elevator cage, a series of hoisting cables attachedvthereto, a pair of levers at'eachside of the cage each pivotally mounted intermediate its endson the top of the cage`,each pair of levers being hingedly connected together at the abutting ends, a series ofraoksJ in the elevator shaft vadapted to be engaged by the ends of the levers, ineans supported on the cables normallyl holdin'gthe 'levers /out of engagement ivith the racks, a 'series of springs tending to throiv thel levers into `engagement With the racks upon breakage of the elevator cables, a. series of levers'pivotally mounted onthe bottom of the cage correspondingin posit-'ion to the levers 'on the top of the cage, an armpi'votally connecting-each lever on the t'o'p of the cage with the :respective lever on the bottom of the' cage for simultaneously actuating the lower lever With the respective upper lever, each. pair of levers being'provided with faces at Vthe abutting ends arranged to come into contact as theends ofthe levers are moved. intofthe racks to limitturning movement of the levers on their pivots. In testimony whereof I sign thisspecification. r

JOI-IN S. VRAHGRITIS. 

